We have found 9 plants that meet your criteria.

Bugbane (syn. Cimicifuga) ‘Actaea simplex Atropurpurea Group’ A late-flowering perennial for shade £8.99 Buy
Price Pruned
Bugbane (syn. Cimicifuga) ‘Actaea simplex Brunette’ Tall, dramatic flower spikes in early autumn NOW £12.99 Buy
Cow Parsley ‘Anthriscus sylvestris Ravenswing’ Lacy purple foliage with a sprinkling of white flowers £6.99 Buy
Aster ‘Aster lateriflorus Lady in Black’ Masses of tiny, pink-tinged daisies £5.99 Buy
White Snakeroot ‘Eupatorium rugosum Chocolate’ A late-flowering perennial with lovely, dark foliage £5.99 Buy
Crocus Special Offers
Coral Flower ‘Heuchera Obsidian’ Striking new variety with glossy jet black-maroon leaves and pure white flowers NOW £5.99 Buy
Crocus Special Offers
Black Lilyturf ‘Ophiopogon planiscapus Nigrescens’ Almost black, grassy foliage NOW £5.99 Buy
Price Pruned
Smoke Bush ‘Cotinus coggygria Royal Purple’ Magnificent smoke-like plumes NOW £8.99 Buy
Veronica ‘Hebe Champagne’ Long-flowering, evergreen shrub with spikes of white flowers £7.99 Buy